Add routed.md example

docs/content/examples/tutorials/routed.md

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+---
+title: Routed setup (No NAT)
+---
+
+This guide shows how to run **wg-easy** with a routed setup so packets are forwarded instead of NATed.
+
+In a routed design, each WireGuard client keeps its own IPv4/IPv6 address. That means you can identify clients by their real addresses instead of seeing everything as the WireGuard server’s IP.
+
+## Requirements
+
+1. You know how to add static routes on your router to the WireGuard server.
+
+## Docker setup
+
+To make use of our own IPv4/IPv6 addresses, run the container with the `network_mode: host` option.
+
+```yaml
+services:
+  wg-easy:
+    image: ghcr.io/wg-easy/wg-easy:15
+    container_name: wg-easy
+    network_mode: "host"
+    environment:
+      - INSECURE=true # TEMPORARY for testing only; remove for production
+    volumes:
+      - ./config:/etc/wireguard
+      - /lib/modules:/lib/modules:ro
+    cap_add:
+      - NET_ADMIN
+    devices:
+      - /dev/net/tun:/dev/net/tun
+    restart: unless-stopped
+```
+
+Because we’re on the host network, remove any `ports:` and container `sysctls:` you might have had before.
+
+## Kernel parameters (on the host)
+
+With host networking, system sysctls must be set on the **host**. On your host, create `/etc/sysctl.d/90-wireguard.conf`:
+
+```
+net.ipv4.ip_forward=1
+net.ipv4.conf.all.src_valid_mark=1
+net.ipv6.conf.all.disable_ipv6=0
+net.ipv6.conf.all.forwarding=1
+net.ipv6.conf.default.forwarding=1
+```
+
+Apply and verify:
+```bash
+sysctl -p /etc/sysctl.d/90-wireguard.conf
+sysctl -n net.ipv4.ip_forward   # should print 1
+```
+
+## Add static routes on your router
+
+Pick an IPv4 and IPv6 subnet for your clients and add static routes on your router, pointing to the wireguard server's LAN addresses.
+
+### Example
+
+I want my WireGuard clients in `192.168.0.0/24` and `2001:db8:abc:0::/64`.
+
+- Routed IPv4 subnet: `192.168.0.0/24`
+- Routed IPv6 prefix: `2001:db8:abc:0::/64`
+- WireGuard server IPs: `192.168.10.118` and `2001:db8:abc:10:216:3eff:fedb:949e`
+
+On your router:
+- Route `192.168.0.0/24` → next hop `192.168.10.118`
+- Route `2001:db8:abc:0::/64` → next hop `2001:db8:abc:10:216:3eff:fedb:949e`
+
+Don't forget to create the neccesary firewall rules to allow these subnets to travel across your LAN.
+
+## Wireguard Easy configuration
+
+In the web UI → Admin → Interface, click Change CIDR and set the IPv4/IPv6 routed subnets you chose above. Save.
+
+Then go to Admin → Hooks and add:
+
+PostUp
+```
+iptables -A INPUT -p udp -m udp --dport {{port}} -j ACCEPT; iptables -A FORWARD -i wg0 -j ACCEPT; iptables -A FORWARD -o wg0 -j ACCEPT; ip6tables -A INPUT -p udp -m udp --dport {{port}} -j ACCEPT; ip6tables -A FORWARD -i wg0 -j ACCEPT; ip6tables -A FORWARD -o wg0 -j ACCEPT
+```
+
+PostDown
+```
+iptables -D INPUT -p udp -m udp --dport {{port}} -j ACCEPT; iptables -D FORWARD -i wg0 -j ACCEPT; iptables -D FORWARD -o wg0 -j ACCEPT; ip6tables -D INPUT -p udp -m udp --dport {{port}} -j ACCEPT; ip6tables -D FORWARD -i wg0 -j ACCEPT; ip6tables -D FORWARD -o wg0 -j ACCEPT
+```